EPIA-M with OPUS and USB stuff

**hotwater9** · 01-30-2003, 12:55 PM

I will be getting my PS back from Kris on Tuesday but I have one major concern. The EPIA-M supplies power to the USB ports even when the system is shutdown. Do any of you have any ideas on preventing this from happening? I am going to have about 4 USB devices and don't want them sucking on my car battery 24-7 (I know the power supply should kick off before the battery is totally dead, but this is still bad for the battery).

Thanks

**TruckinMP3** · 01-30-2003, 01:19 PM

A switch would let you control it manually ( I bet you already thought of that)

Maybe the 12 v power line gets turned off by the egintion (sp?)

Like original equipment radio installs.

**MP3DUB** · 01-30-2003, 04:38 PM

Shouldn't the usb ports being fed power be a function of the motherboard and not the opus?

**t0ffluss** · 01-30-2003, 04:50 PM

doesnt the epia have some sort of an option in the BIOS for this ?

makes no sens to me why the epia should do this...

Richardl...

**hotwater9** · 01-30-2003, 07:23 PM

Yes, it is a problem (for me) with the mother board. I could solve it with a switch, but that beats the purpose of the Opus. I hope I can chane something in the bios (other than turning USB off)!

**Typhoon747** · 01-31-2003, 11:02 AM

How about a powered USB hub wired to the OPUS. When the opus shuts down the Hub turns off and your device will get little or no power.

**MP3DUB** · 01-31-2003, 12:59 PM

And are you sure that the devices are still getting full (100-500ma) power after the system is off? And are we talking off off? or just standby/hibernate/etc? After reading the usb spec, devices are allowed 500ua for remote wakeup, and high powered devices are allowed 2.5ma durring suspend.

**hotwater9** · 01-31-2003, 03:21 PM

All I know is theat the LEDs on my wireless nic and keypad stay on even when the system is shutdown. On my desktop the LEDs turn off.

**az1324** · 01-31-2003, 07:56 PM

There is an option in the BIOS of the epia m that allows you to resume on a usb event. If you disable this I would think that would cut the power to USB devices.